Synonyms for Under-hand:

• adj.

  •clandestine (adjective)
  • under-the-counter,
  • illicit,
  • artful,
  • hidden,
  • underhand,
  • illegitimate,
  • cloak-and-dagger,
  • foxy,
  • private,
  • closet,
  • in holes and corners,
  • underground,
  • covert.
  •covert (adjective)
  • privy,
  • disguised,
  • masked,
  • incognito,
  • unsuspected,
  • under-the-table,
  • veiled,
  • camouflaged,
  • buried,
  • Shrouded,
  • QT,
  • Obscured,
  • Dissembled,
  • ulterior,
  • Incog,
  • cloaked,
  • sub rosa.
  •crooked (adjective)
  • unlawful,
  • ruthless,
  • criminal,
  • questionable,
  • unprincipled,
  • illegal,
  • untruthful,
  • lying,
  • Suborned,
  • iniquitous,
  • dubious,
  • deceitful,
  • double-dealing,
  • nefarious.
  •deceitful (adjective)
  • feline,
  • untrustworthy,
  • disingenuous,
  • subtle,
  • false,
  • hypocritical,
  • roguish,
  • delusory,
  • Impostrous,
  • astute,
  • designing,
  • mendacious,
  • counterfeit,
  • Astucious,
  • illusory,
  • knavish,
  • Deceiving,
  • fallacious,
  • beguiling,
  • slick,
  • rascal,
  • misleading,
  • delusive.
  •deceptive (adjective)
  • fishy,
  • seeming,
  • catchy,
  • spurious,
  • phony,
  • ambiguous,
  • Imposturous,
  • serpentine,
  • scheming,
  • bum,
  • mock,
  • fake,
  • Deluding,
  • snide,
  • plausible,
  • unreliable,
  • specious,
  • off.
  •foul (adjective)
  • inequitable,
  • dirty,
  • caitiff,
  • vicious,
  • monstrous.
  •furtive (adjective)
  • calculating,
  • circumspect,
  • evasive,
  • conspiratorial,
  • cautious,
  • skulking,
  • elusive,
  • Slinking,
  • creepy.
  •indirect (adjective)
  • discursive,
  • circuitous,
  • tortuous,
  • long way home,
  • circumlocutory,
  • zigzag,
  • implied,
  • obscure,
  • collateral,
  • long-drawn-out,
  • rambling,
  • secondary,
  • sidelong,
  • circular,
  • winding,
  • contingent,
  • incidental,
  • vagrant,
  • long-winded,
  • subsidiary,
  • meandering,
  • ancillary,
  • erratic,
  • wandering,
  • out-of-the-way,
  • Snaking,
  • complicated,
  • eventual,
  • periphrastic,
  • twisting,
  • sinister,
  • sinuous,
  • long.
  •roguish (adjective)
  • naughty,
  • devilish,
  • rascally,
  • playful,
  • puckish,
  • impish.
  •scheming (adjective)
  • conniving.
  •sharp (adjective)
  • salty,
  • bent,
  • snaky,
  • shrewd,
  • smart,
  • ornery.
  •shifty (adjective)
  • shuffling,
  • Contriving,
  • collusive,
  • Equivocating,
  • prevaricatory,
  • dodging,
  • prevaricative,
  • Unhonest,
  • cagey,
  • fly-by-night,
  • slimy.
  •shrewd (adjective)
  • judicious,
  • inside,
  • knowing,
  • profound,
  • savvy,
  • sensible,
  • prudent,
  • perspicacious,
  • up on,
  • brainy,
  • ingenious,
  • discerning,
  • in the know,
  • on top of,
  • acute,
  • sagacious,
  • piercing,
  • heady,
  • on the inside,
  • shark,
  • discriminating,
  • quick-witted,
  • wise,
  • wised up,
  • Argute,
  • keen,
  • farsighted,
  • canny,
  • smooth,
  • cutting,
  • sharp,
  • penetrating,
  • streetwise,
  • probing,
  • deep,
  • perceptive.
  •sly (adjective)
  • arch,
  • dissembling,
  • traitorous,
  • intriguing,
  • captious,
  • Bluffing,
  • mischievous,
  • Plotting,
  • mean.
  •sneaking (adjective)
  • Slinky.
  •sneaky (adjective)
  • recreant,
  • base,
  • yellow,
  • malicious,
  • nasty,
  • cowardly,
  • low,
  • contemptible.
  •stealthy (adjective)
  • enigmatic,
  • catlike,
  • sneak,
  • noiseless,
  • silent,
  • catty.
  •surreptitious (adjective)
  • hole-and-corner,
  • on the sly,
  • unauthorized.
  •undercover (adjective)
  • intelligence,
  • creep,
  • confidential,
  • underneath,
  • stealth.
  •underhand (adjective)
  • hush-hush,
  • sneaky,
  • two-faced,
  • crafty,
  • clandestine,
  • cunning,
  • concealed,
  • sly,
  • sneaking,
  • furtive,
  • underhanded,
  • under wraps,
  • double-crossing,
  • crooked,
  • stealthy,
  • secret,
  • sub-rosa,
  • indirect,
  • two-timing,
  • duplicitous,
  • dirty-dealing,
  • unethical,
  • shady,
  • dishonest,
  • unfair,
  • devious,
  • on the quiet,
  • oblique,
  • undercover,
  • slippery,
  • wily,
  • insidious,
  • fraudulent,
  • treacherous,
  • dishonorable,
  • tricky,
  • unscrupulous,
  • on the qt,
  • unjust,
  • guileful,
  • secretive,
  • shifty,
  • deceptive,
  • surreptitious.
  •underhanded (adjective)
  • shorthanded,
  • subversive.
  •unethical (adjective)
  • cheating,
  • disreputable,
  • scam,
  • flimflam,
  • corrupt,
  • unprofessional,
  • mercenary,
  • wrong,
  • improper.
  •unjust (adjective)
  • partisan,
  • Influenced,
  • unjustified,
  • fixed,
  • unforgivable,
  • shabby,
  • biased,
  • below the belt,
  • one-sided,
  • unrighteous,
  • prejudiced,
  • wrongful,
  • unmerited,
  • undeserved,
  • low-down,
  • partial.
  •unprincipled (adjective)
  • unconscionable,
  • reprobate,
  • abandoned,
  • profligate,
  • venal,
  • dissolute,
  • wanton,
  • licentious,
  • mercentary,
  • immoral,
  • conscienceless,
  • amoral,
  • stop-at-nothing,
  • praetorian.
  •unreliable (adjective)
  • irresponsible,
  • fickle,
  • implausible,
  • unstable,
  • unsound,
  • erroneous,
  • sham,
  • weak,
  • mistaken,
  • fallible,
  • wavering,
  • hallucinatory,
  • inaccurate,
  • untrue,
  • undependable,
  • unfaithful,
  • pretended,
  • capricious,
  • vacillating,
  • uncertain,
  • unconvincing,
  • hollow,
  • inconstant,
  • unsure,
  • makeshift,
  • meretricious,
  • pseudo.
  •unscrupulous (adjective)
  • perfidious,
  • casuistic,
  • degraded,
  • arrant,
  • disgraceful,
  • unworthy,
  • scandalous,
  • exploitative,
  • wicked,
  • selfish,
  • shameless,
  • self-seeking,
  • unconscientious,
  • degrading,
  • petty.

Antonyms for Under-hand:

• adj.

  • clandestine
    legal, authorized, truthful, open, public, known.
  • covert
    revealed, candid, overt, unconcealed.
  • crooked
    ethical, law-abiding, scrupulous, lawful, good, straight, principled, trustworthy, moral.
  • deceitful
    reliable, naive, actual, just, upright, loyal, authentic, ingenuous, real, faithful, valid, sincere, genuine.
  • deceptive
    true.
  • foul
    innocent, fragrant, fair, incorrupt, nice, clean, wonderful, inoffensive, pure, pleasing.
  • indirect
    straightforward, direct.
  • sharp
    indefinite, tasteless, low, unstylish, stupid, unintelligent, lazy, dull, boring, flat, ignorant, benevolent, blunt, old-fashioned, slow, undefined, indistinct, bland, calm, kind, mild, moderate.
  • shrewd
    obtuse, idiotic, frivolous, inept, unreasonable, foolish, unclever, senseless, unwise, unthinking.
  • sly
    Behaved, simple.
  • sneaking
    artless, coarse, rough.
  • underhand
    frank, aboveboard, forthright, honest.
  • unethical
    decent, appropriate, Uncorrupt, right, suitable, correct.
  • unjust
    unbiased, equitable, impartial, unprejudiced.
  • unreliable
    definite, steady, certain, responsible, sure, clear, strong, stable, accurate, constant, dependable.
  • unscrupulous
    honorable.